Machine for the manufacture of building blocks and the like



June 26, 1923. 1,460,299

A. E. ,WHITEHOUSE MACHINE FOR THE MANUFACTURE OF BUILDING BLOCKS AND THE LIKE Filed March 16, 1922 f s Sheets-Sheet 1 1,460,299 A. E. WHITEHOUSE Filed March 16. 1 922 3 Sheets-Sheet 3 w m e M I HHHH IHHHHHHHHHHHI U mm m T m Qq o a mm H 5 m k Hi mm AMP, o a TIM/m E f. m- .0 FIB LW E I H hfluHHHHH HMHHU n 5 9 Q Q U June 26, 1923.

MACHINE FOR THE MANUFACTURE OF BUILDING- BLOCKS AND THE LIKE Jfin- 26, 1923.

A. E. WHITEHOUSE N HE MANUFACTURE OF BUILDING BLOCKS AND THE LIKE 3 Sheets-Sheet 5 Filed March 16 J t t lllllllllll I'll l!- Patented June 26, 1923,

v H E earner; w rirnnoosn, or MONTREAL, aunenc, CANADA.

ncnmnronrnn MANUFACTURE or BUILDING snocnsann 'r -in LIKE.

Application filed March 16, 1922. Serial No. 544,385.

To all whom it may concern:

Be it known that I, ARTH E. VI-IITE- HOUSE, of the city of Montreal, Province of Quebec, Dominion of Canada, a subject of the King of Great Britain, have invented certain new and useful Improvements in a Machine for the Manufacture of Building Blocks and the like and I do hereby declare that the following is afull, clear, and exact description thereof.

My invention relates particularly to the molding of concrete building blocks although it is adaptable with equal facility to the manufacture of many other articles of like nature such as drainage and ventilating members; and it has for its object to enable the molding operation of each block to 'be carried out more rapidly and to produce a block more compact and of more uniform density throughout its mass than has been practicable in the past.

To this end the'invention consists of the process, product and the machine utilized in carrying out said process hereinafter described and illustrated, and pointed out in the claims.

For full comprehension, however, of my invention, reference must be had to the ac"- companying drawings in which similarreference characters indicate the same parts, and wherein: p

Figure 1 is a plan View of a machine particularly adapted to the process of manufacturingbuilding blocks and the like forming a part of my invention;

1 Figure 2 is aside elevationthereoi;

Figure 3 is a transverse sectional view taken on line 3-3 Figure 1;

Figure 4% is a longi udinal taken on line 4.4; Figure l;

Figure 5 is a transverse sectional View taken on line 5-5 Fig. 1;

Figure 6 is a longitudinal sectional view taken on line 6-6 Figure 7 g p Figure 7 is a fragmentary plan view drawn to a scale larger than that of Fig ure 1; w I

Figure 8 is a sectional-view talren on line 8-8 Figure 6;

Figure 9 is a detail View of the block uniting the longitudinal cores;

"Figure 10 is a detail fragmentary view sectional view illustrating the manner in which the cores telescope in the mold box; and

Figure 11 is a detail perspective View of the completed block.

The process.

My improved process which is substancores is or are then forced into the material in the mold displacing the former to an e?- tent equal to the capacity of the core or cores, and causing a' slightcompression of the material in an outward direction, and at the same time forming ducts or chambers therein. Before withdrawing the core or cores the partially completed product is again compressed by applying external pressure to it, this pressure being applied to one or all sides andbeing varied to meet different conditions. Following this supplementary compression and before being relieved 0t such pressure the core or cores are withdrawn, the pressure preventing particles of the materialadhering to it or them dur-v ing withdrawal and consequently avoiding rough surfaces and ragged edgeson the ished article. The mold-box isfinally opened and the product removed.

T he product.

nanny than i i art le Qbteined r the commonpracticeof positioning the cores in the mold before the latter is f lled, and

e fi lns i l meld with the s-ee eliti iee material, and manually tamping the same,

These characteristics obtained are of considerable importance particularly 1n building blocks and drainage members, the portions of the latter surrounding the ducts therethrough possessing the same strength as the remainder of the article and consequently eliminating weakness which is apt to occur at these points.

The machine.

The detail construction of the machine which I employ in carrying out the process may be modified to meet different CQIldL tions without departing from the sp1r1t of the invention, that illustrated however c011- situtes the preferred embodiment and is particularly adapted to the manufacture of building blocks of rectangular form having one or more longitudinal passages or ducts extending therethrough from end to end.

Briefly stated it consists of a sub-structnre or supporting frame, a collapsible moldbox adapted to be completely closed when filled, cores adapted to be introduced into the mold-box after the latter has been filled, means for actuating the cores in their movement into the mold-box, means for automatically stopping the cores when they have reached the desired position in the IIlOlClbOX, means for actuating a pair of compression members to cause supplementary compression of the molded article before the cores are withdrawn, means for automatically stopping the compressionmovement of the said members when the desired compression has been obtained, means for withdrawing the cores, and means for automatically stopping the withdrawal movement of the cores.

The sub-structure or supporting frame consists of preferably three longitudinal members 2, 3 and 4, the intermediate members 3 being located in close proximity to the member 4 and the space therebetween being substantially equal to the width of the mold-box which is supported thereon at one end. These longitudinal members are preferably of channel crosssection and are united and braced by transverse members 5. These transverse members may consist of channel irons if a heavy frame is desired, but in the present embodiment they are constituted by tie rods 6 and spacing sleeves 7 encircling the rods.

The collapsible mold-box is elevated upon a rectangular frame 8 positioned upon the members 3 and 4. The moldbox illustrated is particularly adapted to the molding of building blocks and comprises longitudinal side walls 10 and 12, end walls 13 and 14, bottom 15 and top or cover 16. The bottom is removable and is adapted to rest upon the rectangular frame 8 so that when the molding of the block has been completed and the mold-box thrown open the bottom with the block thereon may be lifted out,

The side wall 10 is fixed and one side edge of the cover 16 is hingedly connected thereto as at 17 and when the latter is thrown open it is to be supported as indicated in Figure 3 upon brackets 18 rigidly mounted upon such wall. The opposite wall 12 is hinged adjacent its lower edge upon the frame 8 as at 19 the hinge point being so posltioned that the wall is maintained in vertical pos1- tion by gravity. Such last mentioned wall adjacent its upper edge is provided with a bead 20 presenting a shoulder which is adapted to be engaged by locking means for securing the cover in closed position. This locking means consists of a latch 21 of angular form hingedly suspended by its upper end from a bracket 22 mounted upon the cover adjacent the free side edge of the latter, the lower end 23 of the latch being adapted to assume a locking position engaging the underside of the bead 20.

In order to provide manually operated means for raising and lowering the cover and moving the latch to and from looking position a lever 24 is pivoted thereon as at 25. This lever is provided with an eccentric slot 26 through which a stud 27 on the cover projects, the slot being so disposed that downward movement of that portion of the lever constituting the handle 28 moves the latch into locking position as indicated in Figure 3, while upward movement ofthe handle realeases the latch. This construction and arrangement of partsenables the operator by one continuous movement to Igither throw open or close and lock the mold- The ends 13 and 14 are movable to and from each other for the purpose of causing compression of the article being molded after the cores have been introduced and each is provided with as many apertures 29 as there are cores, the latter being inserted into the mold-box therethrough.

However before describing the detail con struction of these ends and the means for actuating the same, I shall describe the cores with their actuating mechanism.

The present embodiment includes two core units 30 and 31 located adjacent opposite ends of the mold-box and adapted to be introduced thereinto simultaneously.

ach unit consists of a plurality of horizontally aligned parallel pipes 32, or if desired. rods of solid cross-section having ta-.

pered ends 33, adapted to be moved axially ing forced through the material therein until their ends abut. The pipes constituting the unit are supported in brackets 34 and 35 mounted uponthe members 3 and 4 of the main frame, and they'are unitedat a point adjacent their rear ends by a transverse member 36 of prism or block form. The pipes constituting the core unit 31are supported in brackets 37 and 38 also mounted upon the members 3 and 4and these pipes are united by a transverse member similar to that uniting the pipes of the first The mechanism for simultaneously and for withdrawing them therefrom includes a pair of pulleys 40 and 41 adapted to be rotated in opposite directions by belts 42 and 43 from any available countershaft. These pulleys are mounted upon aitransverse shaft 44 journalled in bearings 45 on the main frame and they are adapted tobe rotated independently of the shaft unless rotatively connected thereto through a dupleX clutch mechanism '46. This clutch is adapted to be operated both manually and automatically. It is manually operated by a vertically disposed lever 47 fulcrumed on a bracket 48 projecting laterally from the member 4 of the main frame and it is connected atits lower end to a second lever 49 which in turn is connected to an axially slidable rod 50 extending across the main frame and having an arm 51 operatively connected to the clutch mechanism to be hereinafter described. The operative connection between thecore unit 30 and the pulley 41, rotation of which causes the two units to be inser'ted into the mold-box, consists of a pinion 50 keyed upon shaft 44 and intermeshing with the gear 51 mounted upon the end of a shaft 52 journalled in the bracket 35, a pinion 53 keyed upon such shaft in position immediately beneath and in'termeshing with a rack 54 which is rigidly secured at one end to the'transverse member 36. The rotative connection between the pulley 41 and the other core unit 31 is effected through a sprocket wheel 55 keyed upon a shaft 44, a sprocket 56keyed upon shaft 57 journalled in a bracket 38, a chain 58 encircling such sprocket Wheels and effecting a rotative connection therebetween, pinion 59 keyed upon shaft 57 and a rack 60 intermeshing with the last men-Y tioned pinion and secured to the underside of the transverse member 38.

When it is desired to introduce the core units into the mold-boX lever47 is moved in the direction indicated by the arrow in Figure 1.. This action through clutch 46 effects a rotative connection between pulley 41' and shaft 44 and sets the pinions 53 and 59 in motion. These pinions rotate in opposite directions and feed theracks and consequently the core units through the apertures 29, in the "mold boXends. The movement continues until the ends of the pipes of one unit "engage those of the pipes of the other unit and complete the passages through the block. In order to permit the ends of one unit to telescope with the ends of the other unit, those ofthe unit 30 are tapered to a point and are adapted to enter the ends .of the other unit which are tapered to blunt points having openings 61 to receive the first-mentioned ends. Simultaneously with relative engagement of the core units their movement is adapted to be automatically stopped. This is effected by atrip device 62 located in the path of the transverse member 36 and adapted to be cengagedthereby for the purpose of axially shifting the rod 50 and through arm 51 throwing out the clutch 46 and breaking the rotative connection betweenoshaft 44 and pulley 41; The =means for operativelyconnecting the trip 62 to the rod 50 for the'purpose of axially shifting the latter consists of a horizontally disposed arm 63having the trip mounted at'its free end and having its opposite end connected to an upwardly projecting rocker arm 64 mounted upon the rod 50, such arm having a lateral projection 65 presenting a cam face 65 which is adapted to engage a stationary roller 66 mounted upon a bracket 67 on an adjacent portion of the machine frame. When the trip is engaged by the member 36 the arm 64 is rocked uponthe rod 50 which movement causesthe cam face 65 to engage roller 66 with the resultant shifting of such rod. The same mechanism which is employed for inserting the core units into the mold-boX is also employed for withdrawing them therefrom with the except-ion that "the pulley v41 remains idle while the pulley 40 is rotatively connected tovshaft 44 thereby causing rotation of the latter in the reverse direction. The withdrawal movement of the core units may be stopped at any time during the operation through lever 47, and is adapted to be stopped au-,

tomatically when the full extent of withdrawalhas been obtained. The means for automatically stopping the withdrawal movement is similar to that employed in automatically stopping the inserting movement of thecore units and consists of a trip device 70 located inst-he path of the member 36 and on the rear side of the latter, an arm 71 carrying said trip on its free end and having its opposite end connected to the rocker arm64 and an inclined face 72 presented, by a projection 72' on said rocker arm and adapted to engage a roller 73 rotatably mounted on a bracket 74. It'will be seen that with this construction and an rangement of parts engagement of one trip by the member 36 repositionsthe other trip which has been displaced by a previous reverse movement of the core unit. In order to prevent the clutch 46 being shifted to position effecting a rot ative' connection between the pulley 41 and the shaft 44 imme diately after the inserting movement has been completed or to position effecting a rotative connection between pulley 40 and shaft 44 immediately after the withdrawal movement has been completed the rollers 66 and 73 are so positioned that in the first instance the former will be in transverse alignment with the projection 65 and in the second instance the latter will be in transverse alignment with the projection 72 so thatin the event of the operator attempting through error to shift the rod in the wrong direction the roller, which is in alignment with its respective projection, will be engaged thereby and further movement in that direction prevented. The operator will immediately see his mistake and will shift the rod in the reverse direction. I

Before the core units are withdrawn the mold-box ends 13 and 14 are moved towards each other for the purpose ofcompressing the partially completed block. This -movement'is effected by a pair of eccentrics 80 and 81 mounted upon a shaft 82 and connected to frames 83 and 84 of invertedU- form hinged upon and straddling the main frame members 3 and 4 and having their upper ends hingedly connected to arms 85 on each of the mold-box ends so that the latter when not in use may be thrown back to the position indicated in dotted lines in Figure 2., Rotation of shaft 82 is obtained from a pulley 83 on a second shaft 84 disposed par allel to'shaft 82, through a pinion 85 keyed on shaft 84 and intermeshing with a'gear 86 keyed on shaft 82 the pulley 83 being rotat able relatively to the shaft 84 and adapted to be rotatively connected thereto by a clutch 87. The latter is thrown in by a treadle 88 fulcrumed as at 89 on the machine frame and having a turned up end 90 pivotally connected to the lower end of a link 91. This link is fulcrumed midway its length as at 92 and its upper nd is pivotally connected to one end of a lever 93 located inposition straddling the clutch 87 and" adapted to actuate the same such lever being mounted in a bracket 94 on the machine frame.

In order to automatically stop the moldbox ends when the desired compression has been obtained and to prevent them from returning to initial position before the cores are withdrawn the clutch is adapted to be thrown out by a cam 95 consisting of a disc keyed upon shaft 82 and presenting a pair of projections 96 located diametrically opposite each other and adapted to engage a roller 97 on the adjacent end of the lever 93, the latter and consequently the clutch being shifted when uch engagement takes place.

cam member and thereby cause the eccentrics to stop instantly when the clutch is thrown out by cam 95. It may be found desirable to apply the brake to some other element of the actuating mechanism and it is to be understood that this may he done without departing from the spirit of the invention.

Operation.

The operation of the foregoing machine briefly stated is as follows: When the mold box has been filled with the cementitious material and the cover secured in position therein lever 47 is moved in the direction of the arrowindicated in Figure 1 thereby effecting a rotative connection between shaft 44 and pulley 41 and consequently setting pinions 53 and 59 in motion, these pinions rotate in opposite directions and feed the racks 5 4 and towards the ends of the mold box and consequently insert the core units into the latter through the aperture 29 this movement continues until the ends of the pipe of one unit engage those of the pipes of the other unit and complete the ducts through the block. Simultaneously with relative engagement of the core units their movement is adapted to be automatically stopped by transverse member 36 engagin the trip device 62, this engagement throwing out the clutch 46. Before the core units are withdrawn the mold box ends 13 and 14'are moved towards each other for the purpose of compressing the partially completed block, this compression is effected by the pair of eccentrics and 81, the latter being driven by the pulley 83. Compression movement of the mold box ends'is automatically stopped by the cam 96 which throws out the clutch '87 before the block is released from the pressure exerted thereon by the mold box ends and the cores are withdrawn. To effect this the lever 47 is moved in the opposite direction to the starting movement thereby effecting a rotative connection between pulley 40 and shaft 44 and consequently driving the pinions 53 nd 59 in the opposite direction to that of the inserting operation. The withdrawal of the cores is automatically stopped in a manner similar to that in which the inserting movement is stopped, the member 36 engaging the trip device 70.

With the withdrawal of the cores completed the ends of the mold box are returned to their initial positions and the box thrown open and the block with the removable bottom of the mold box starting it removed.

What I claim" is as follows:

1, A collapsible mold box including a pair of end walls and a pair ofparallel side walls one of said walls being, fixed and the other hinged at its bottom edge for the purposeof enabling it to be swung in a direction away from the fixed wall, a coverfor closing the top of said box and hinged at one side edge upon said fixed wall, means for locking the cover in closed position said "means including a projection upon said hingedwall, and a gravity latch hinged upon said cover and adapted to engage said projection.

2. A collapsible mold box including a pair of parallel side walls one of said walls being fixed and the other hinged at its bottom edge 7 for the purpose of enabling it to be swung in a direction away from the fixedwall, a cover for closing the top of said box and hinged at one side edge upon said fixed'wall, means for locking the cover in closed position said means including a projection upon said hinged wall, a gravity latch hinged upon said cover. and adapted to engage said projection, and means for locking said latch in position in engagement with said projection.

8. A collapsible mold box including a pair of parallel side walls one of saidwalls being fixed and the other hinged at its bottom edge for the purpose of enabling it to, be swung in-a direction away from the fixed wall, a cover for closing the, top of said box and hinged at one side edge upon said fixed Wall, means for locking the cover in closed position said means including a projection upon said hinged wall, a gravity latch 'hingedupon said cover and adapted to engage said projection, and means for releasing said latch from position engaging said projection.

4. A collapsible mold box including a pair of parallel side walls one of said walls being fixed and the other hinged at its bottom edge for the purpose of enabling it to be swung in a direction away from the fixed wall, a cover for closing the top of said box and hinged at one side edgeupon said fixed wall, means for locking the cover in closed position said means including a projection upon said hinged wall, a gravity latch hinged upon said cover and adapted to engage said projection, and meansfor locking said latch in position in engagement with said projection,isaid last-mentioned means consisting of; a stud upon said cover and a eccentric slot accommodating said stud the position of the slot being such that down-r ward movement of the lever locks said latch. 5. A collapsible mold box including a pair of parallel side walls one of said walls projection, and means for releasing said latch from position engaging said projection, said last mentioned means consisting of a stud upon said cover and a lever plvoted upon said latch and having an eccentric slot accommodating said stud, the position of the slot being suchthat upward movement of the lever releasessaid latch.

6. A collapsible mold box including a pair of parallel vertical side walls oneof said walls being fixed and the other hinged at its bottom edge for the purpose of enabling it to be swung in a direction away from the fixed wall the hinge point being so positioned that said wall is maintained in its vertical position by gravity, and a cover for closing the top of said mold-box and hinged at one side edge upon said fixed wall and the gravity latch mounted upon the cover and adapted to engage the hinged wall, j

7. In a machine of the type described, a closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture and means for moving said coie into said mold box after the latter has been filled with a material for the purpose of forming a ductin the molded article and causing compression of the latter and means for automatically stopping said core when it has reached a predetermined point in the mold said means consisting of an abutment movable in unison with said core, a trip clevice located in the path of said abutment ed to be inserted into said mold box through said aperture and means for moving sa d core into said mold box after the latter has been filled with a material for the purpose of forming a duct in the molded article and causing compression of the latter, and means for withdrawing said core from the mold box, said last-mentioned means consisting of a driving shaft, a pulley upon said driving shaft, clutch mechanism adapted to effect a rotative connection between said pulley and shaft, a pinion uponsaid shaft, a second shaft, a gear upon said second shaft and in intermeshing engagement with said pinion, a second inion upon said secondshaft and rotatab e in unison with said gear, and a rack movable in unison with said core and intermeshing with said second pinion.

9. In a machine of the type described, a

closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture and means for moving said core into said mold box after the latter has been filled with a material for the purpose of forming a duct in the molded article and causing compression of the latter, and means for withdrawing said core from the mold box, said lastmentioned means consisting of a driving shaft, a pulley upon said driving shaft, clutch mechanism adapted to effect a rotative connection between said pulley and shaft, a pinion upon said shaft, a second shaft, a gear upon. said second shaft and in'intermeshing engagement with said pinion, a second pinion upon said second shaft and rotatable in unison with said gear, and a rack movable in unison with said-core and intermeshing with said second pinion, an abutment movable in unison with said core, a trip device located in the path of said abutment and adapted to be en ga-ged thereby and means adapted to be actuated by said trip device for releasing said clutch.

10. In av machine ofthe type described, a closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture and means for moving said core into said mold box and withdrawing the core therefrom said means consisting of a rack movable in unison with said core, a shaft located infixed position, a pinion rotatably mounted upon said shaft and in intermeshing relation with said shaft, a gear rotatable in unison with said pinion, a driving shaft, a second pinion. keyed upon said drivingshaft and intermeshing with, said gear, a pair of pulleys in rotative relation with said shaft and adapted torotate the same in opposite directions, clutch mechanism for effecting a rotative connection be tween each pulley and said shaft, means for automatically stopping said core when it has reached a predetermined point in the mold, and means for automatically stopping said core when it has reached a predetermined point in its withdrawal movement.

11. In a machine of the type described, a mold box having an aperture therein, a horizontally disposed core movable through said aperture into the mold box, means for moving said core into the mold box, means for automatically stopping the core after it has reached a predetermined point in the mold box, and means actuated by said stopping means for locking the core-moving means against further movement of the core into the mold box.

12. In a machine of the type described, a closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture, means for moving said core into said mold box after the latter has been filled with a plastic material for thevpurpose of forming a duct in the molded article and causing the compression of the latter, means for withdrawing the core from the mold box, said last-mentioned means including a driving shaft, a pulley in rotative relation with said driving shaft, a clutch adapted to effect a'rotative connection between said ulley and shaft, means for automatically throwing out said clutch when the core has reached a predetermined position in the mold box, and means operatively connected to said last-mentioned means for preventing said clutch being thrown in to position rotatively connecting the pulley to its shaft before the core has been withdrawn fromthe mold box.

13. In a machine of the type described,

a closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture, means for moving said core into said mold box after the latter has been filled with a plastic material for the purpose of forming a duct in the molded article and causing the compression of the latter, means for withdrawing the core from the mold box said last-mentioned means including a driving shaft, a pulley in rotative relation with said driving shaft, a clutch adapted to effect a rotative connection between said pulley and shaft, means for manually operating said clutch, said means including .an axially m ovable rod, an arm rigidly carried by said rod and in operative engagement with said clutch, and a manually operated lever connected to said rod, means for automatically throwing out said clutch when the core has reached a predetermined point in said mold box.

14:. In a machine of the type described, a closed mold box having an aperture in one end and a horizontally disposed core adapted to be inserted into said mold box through said aperture, means for moving said core into said mold box after the latter has been filled with a plastic material for the purpose of forming a duct in the molded article and causing the compression of the latter, means for withdrawing the core from the mold box, said last-mentioned means including a driving shaft, a pulley in rotative relation with said driving shaft, a clutch adapted to efi'ect a rotative connection between said pulley and shaft, means for automatically throwing out said clutch when the core has reached a predetermined point in itswithdrawing movement in the rotatively connecting the pulley to its shaft before the core has been moved in the re-i verse direction, said last mentioned means consisting of an abutment movable in unison with said core, a trip device located in the path of said abutment and adapted to be engaged thereby, a cam member operatively connected to said trip device and adapted to cause axial movement of said rod when the tri device is engaged by said abutment and means coacting with the cam member in causing the axial movement of said rod and adapted to prevent axial move ment of the rod in the reverse direction before the core is withdrawn from the mold box.

15. In a machine of the type described a mold box having a horizontally movable vertically disposed end wall containing an aperture, a core horizontally movable through said aperture into and from the mold box, means for moving said core, and means for moving said wall.

16. In a machine of the type described a mold box having a horizontally movable vertically disposed end wall containing an aperture, a core horizontally movable through said aperture into and from the mold box, means for moving said core, and means for moving said wall. and means for automatically stopping the movement of the core into the mold box when the core has reached a predetermined point.

17. In a machine of the type described a mold box having a horizontally movable vertically disposed end wall and containing an aperture, a core horizontally movable through said aperture into and from the mold box, means for moving said core, and means for moving said wall, and means for automatically stopping the withdrawal movement of the core from the mold box when the core has reached a predetermined point.

18. In a machine of the type described a mold box having an aperture, a core adapted to be inserted into the mold box through said aperture, and means for compressing the material in the mold box after the core has been inserted. I

19. In a machine of the type described a mold box having an aperture, a core adapted to be inserted into the mold box through said aperture, and means for compressing the material in the mold box after the core has been inserted, said last mentioned means consisting of a movable member constituting one of the walls of the mold box and said aperture, and means for compressing the material in the mold box after the core has been inserted, said last mentioned means consisting of a member constituting one of the walls of the mold box, an eccentric, a rod operatively connecting the member to the eccentric, and means for imparting rotation to the eccentric.

22. In a machine of the type described a mold box having an aperture, a core adapted to be inserted into the mold box through said aperture, and means for compressing the material in the mold box after the core has been inserted, said last mentioned means consisting of a pair of spaced movable members constituting oppositely disposed walls of the mold box, and means for moving said members simultaneously towards each other, said last mentioned means consisting of a pair of eccentrics, rods operatively connecting each eccentric to one of said members, and means for imparting rotation to said eccentrics.

23. In a machine of the type described, a mold box the ends of which are movable towards and from, each other for the purpose of compressing the material in the mold, each of said ends having an aperture,

a horizontally disposed core located at each end of the mold box and adapted to be moved longitudinally thereinto in opposite directions through said openings, means for actuating said cores, and means for actuating said ends.

24. In a machine of the type described, a mold box the ends of which are movable towards and from each other for the purpose of compressing the material in the of compressing the material in the mold,

each of said ends having an aperture, a horizontally dlsposed core located at each end of the mold box and adapted to be moved a horizontally disposed core located at each end of the mold box and adapted to be moved longitudinally thereinto inopposite directions through said openings, means for actuating said cores, and means for actuat- 15 ing said ends means for limiting the extent of movement of the cores relatively to the mold box, means for limiting the extent of movement of the said ends.

In testimony whereof I have signed my 20 name to this specification in the presence oftwo Witnesses.

ARTHUR E. WHITEI-IGUSE. Witnesses:

GoRnoN G. Coonn, HARRmTTn MCDONALD. 

